Remove the top layer of sticky black tape, then prep the LCD assembly and new touchscreen/digitizer with new adhesive--I just used thin strips of two-sided tape.

Using a microfiber cloth remove any dust from the LCD display.

Slide the new touchscreen/digitizer cable between the frame and LCD display.

Be VERY careful with the touchscreen/digitizer cable! If needed, it is ok to lightly and carefully push against the backside of the LCD to create more space. You may need to pull the cable through forcefully; just don't rip it or break the LCD.

Once the cable is through go ahead and remove all paper from adhesives and set the screen in place.

Now you can begin reconstructing your phone. Go ahead and go through the steps backwards.

Reattaching the cables is the trickiest part but not impossible.